Pump assembly



Sept- 16, 1941- K. E. LUNDIN 2,255,852

PUMP ASSEMBLY Filed April 19, 1940 2 SheetS-Sheefl l Sept. 16, 1941. K, E, LUNDlN 2,255,852

PUMP ASSEMBLY Filed April 19, 1940 2 Sheets-Sheet 2y 58 v 55 72 :a 6 is 405/ o f 75/ /3 l i /2 @i 62 (may) Patented Sept. 16, 1941 PUlVIP ASSElVIBLY Knut E. Lundin, Los Angeles, Calif., assgnor to ompressor Company, Los

Radial Pump and C Angeles, Calif.

Application April 19, 1940, Serial No. 330,518

Claims. (Cl. 103-6) The present invention relates to pumping devices and particularly to an improved pump assembly adapted for pumping either air or water, or a combination of both.

It is an important object of the invention to provide in a device of the above character improved means for pumping either air or water alone or simultaneously. When operating in the latter fashion the device is particularly well adapted for pumping water from deep wells wherein the air from the air cylinders opens into a casing connected to the Water cylinders below the level of the Water in the well casing.

One object of the invention is to provide a novel and improved combined basal support and,

water conduit for a pumping assembly, said assembly being arranged to pump both air and water, such basal support being of a sturdy character and also affording a convenient means for quickly installing the pumping structure in its operative position.

Still another object relates to the provision of a combined pump assembly housing and uid containing chambers, the walls of said chambers not only forming parts of the conduit system of the pump but also serving as cover members for the housing which may readily be removed therefrom and reattached whenever access to the interior of said housing is desired.

A yet further object is to provide, in combination with other features of the invention, a pump cylinder structure wherein the residual air space remaining after the piston Ihas advanced to the limit of the expulsion stroke is reduced to a minimum, this feature being a result of constructing and positioning the valves in animproved manner.

It is also an object of the invention to provide, along with other improved features, a pumping assembly which may be mounted with either of two opposite sides directed upwardly, thereby facilitating connecting therewith the driving means.

It is also an object of importance to improve upon and simplify the construction set kforth in my Power transmitting device, patented June 13, 1933, No. 1,914,141.

With the foregoing and other objects in View, the invention resides in the novel arrangement and combination of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention 'herein disclosed may be made within the scope of the subject matter claimed without departing from the spirit of the invention.

Apparatus embodying features of my invention is shown on the accompanying drawings, forming a part of this application, wherein,

, Fig. l is a plan view of the improved apparatus;

Fig. 2 is a View similar to Fig.'1 with certain upper portions removed in order to show interior construction;

Fig. 3 is a section taken on line 3-3 of Fig. 1, except that some parts are shown in elevation;

Fig. 4 is an enlarged vertical mid section of one of the intake Valves; and,

Fig. 5 is an enlarged mid section of one of the discharge valves. l

Referring in detail to the drawings, and at first more particularly to Fig. l, a pumping assembly IU is shown supported by a horizontally extending basal conduit II, which is approximately C- shaped, said assembly communicating with said conduit through the same pipe sections I2, I3 and I4 whereby it is supported superjacent thereto.

In the illustrated embodiment of the invention, said pumping assembly is contained within a hexagonal housing frame I5 and comprises a series of six pumping cylinders, three of which, 20, 2| `and 22, are shown for pumping air and the alternating other three, 23, 2li and 25, are shown for pumping water. Said six cylinders occupy substantially the same horizontal plane and are circumferentially arranged in relation to the circular conduit Il with their axes radi.

ally positioned in relation to the center of the pumping assembly. Said cylinders and their pistons 3U and adjacent parts (except the master rod 29) are all shown as being of identical construction and therefore are all lettered in the same manner.

Five of said pistons each have a rod 3| which is rockably connected by a pin 32 to a gyratory split crosshead disk 33.

Said crosshead disk is shown mounted upon and driven by an integral crankshaft structure comprising a central shaft section 34 having eccentrically related to it a circular lower enlargement 39 furnished below with a short shaft section 49; there being above said crosshead disk another circular enlargement 35 which has upwardly extending from it a short shaft section 36, t'he shaft sections 36 and 40 being in alinement with each other. The shaft section 36 is journaled in a bearing 36h which is of an inverted cup shape and which is tted into a tubular cross wall 31 of a top reservoir 38. Likewise the lower shaft section 45 has -a cup-shaped bearing 4912 whichis contained in a circular cross wall 4l of a lower reservoir 42. A circumferential Y iiange or bead 35a of the crankshaft enlargement 35 is shown as being of the same diameter as the lower shaft enlargement 39, but above said portion 35a the part 35 is shown machined down to a less diameter. Said flange 35a affords a supportfor the gear 35h which is mounted upon the shaft enlargement 35 and is keyed thereto at 351C. With `the gear 35i)` meshes a driving pinion 55 carried by the lower end 0f a shaft 46, said shaft having xed to its upper end a pulley 41 driven by t'he belt 48.; j y A description will now be given of the structural details found in each of the six identical piston and piston cylinder units."V

Using for Van example the piston unit inder has hanged portions 251 near housing frame Vi5, vsaid frame khaving suitable circular openingsinto which are fitted the basalV portions oftthis and all the otherpiston cylinders.

The rod eV of the piston being described, as'

has already been mentioned, is not pivotally, but rigidly connected to the crosshead disk 33. It is `the master guide-connecting-rod which maintains the proper eccentricity of the remaining pins 32 with respect to their center of gyration. Rivets129a. connectl said rod 29 to said disk 33.

Each. of the piston rods 3l,Y like the master rod 29, is swingably connected with its piston by means of a pin or small shaft 49 which extends diametrically of the inner portion of the head of the piston.

.To the outer end of each piston cylinder is secured ia chambered piston cylinder cap 59 fur--` versely positioned as to intake andexhaust. This isV dueto .the fact that the air and-water handling pistons alternate witheach other as can lbe seen from the fact that alternate cylinders of Figs. l and 2 have air lters 51; Asshown. in Figs, each ofsaid lters is of a tubular character, having an externally threaded shank 51sk which is screwed into a passagewhich leads into the chamber 55.

In Fig. y4e is shown in detail the structure of the intake valve 58 which in the upper left hand portion of Fig. 3 permits air entrained through the air lter 51 into chamber 55 to fioweonly in a direction for -discharging it from said chamber 55 intothe piston cylinder; the same kind. of valve structure 58 in the lower right hand portion of Fig.l 3 permitting water entering Achamber 56 frompipe l2 to iiow onlyin a direction to be entrained from said chamber into the piston cylinder.

E ach valve58 seats upon the beveled seat of a valve seat member 53a which is screwed into the passage 59 to which its relates. Valve seat mem- Vberf58'a has anannular flange V58h around the valve seat 'which is countersunk flush with the inner face of the cap 50. `Diametrically across the. member -58a'extends a web 60 `throughwhich, works the vheaded stem 6Iv of the valve, 58, la` 751atlowerreservoir; said reservoirsbeing in aver` whichA has the cylinder (left side of Fig. 3) said cylV '20.

detesta spring B2, occupying a seat 63, tending to mv'e the valve to its seated position. l

In Fig. 5 is shown in detail the structure of an exhaust valve 65 which, in the lower left hand portion of Fig. 3 permits air to flow only in a direction for discharging it from the piston cylinder into the chamber 56 and thence through a conduit V15 into the lower reservoir 42,; Aand this valve structure in the upper right hand portion of Fig. 3 permits water to flow only in a direction for discharging it from the piston cylinder into the chamber 55, and thence through conduit 16 into the upper top reservoir 38.

From theY top reservoir 38 the water iiows through conduit 11 to a place of use; a conduit 18 conducting the air from the lower reservoir 42 to a place of use.

1 Each .valve 65seats upon thebeveled seat of a valveseat member 66 which is screwed into the passage 61 to which it relates. Diametrically across said member 65Y extends a web 68 through Y whichgworks the headed stem 69 of the valve 65. At its opposite side said valve has a central kpro-` jection 10 around which-is coiled one en d portion of acompressicn spring 12 which spans the cham# ber 56 (or 55) and tends to seat the valve.4

Valve seat member 66 has an annular iiange 5taY around the valve seat which is countersunk flush with the inner face of the cap 58.

Water .from an available source, as for example from a well, is entrained by certain of the cylindersy inthe pump assembly I9 through a pipe Hf into the C-shaped pipe Il.k From-said pipe Il the water' isconveyed through the'three upstanding pipeslZ,Y I3, and I4 to the chambers 58 of the cap of therespective ycylinders 23, 24, and 25. Fvrom'saidV caps 58, the pistons 36 on their suction strokeropen the intake valves 58 by overcoming the.A resistance of springs 62 and. draw the water into each said respective cylinder. VOn the ex-V haust stroke of each piston of said respective.

cylinders thevalve 65 ,is opened byk overcoming ther resistancel of the spring 12, and water is forced through said valve into the chambersV Y 'i offthevrespective cylinders, thence through conthel respective cylindersV and then forceV it rout.. through conduits 15 into the air reservoir Yl2,.the. previously described mechanism, similar to thatVV used in the operation of pumping water just. outlined.' Y i The air from the reservoir may be utilized to` aid in elevating the waterl from a. well supplying` waterY tothe pipe Hf, in a manner which is well known.

YPower forv operating `,the pistons connected .totA the cross head 33 is supplied bythe crank shaft through the medium of the gearing 35hl and45- countersunk in orderV that no air pockets may exist @which would tend to decrease the eiciency' ofv themachine.

AWhat is claimedy is: 1.,.In a. pumpingassembly, an` upper reservoir,

tically spaced relation to each other, a polygonal housing frame having an upper end attached to and closed by said upper reservoir and a lower end a-ttached to and closed by said lower reservoir, said housing frame having peripheral openings, a plurality of pumping cylinders radially disposed in relation to the center of said frame with open inner ends fitted into said openings, caps closing the outer ends of said cylinders, each of said caps being provided with an upper chamber and with a lower chamber, pistons operating in said cylinders, valves in each of said caps permitting fluid to be entrained from one Of said chambers into the piston cylinder closed by such cap and thence discharged from said cylinder into the other of said chambers, a common driving means for said pistons located within the aforesaid housing frame, and conduit means affording communication between certain of said chambers and said upper reservoir :and the remainder of said chambers and said lower reser- Voir.

2. In a pumping assembly, an upper reservoir, a lower reservoir, said reservoirs being in a vertically spaced relation to each other, a polygonal housing frame having an upper end attached to and closed by said upper reservoir and a lower end attached to and closed by said lower reservoir, said housing frame having peripheral openings, a plurality of pumping cylinders radially disposed in relation to the center of said frame with open inner ends fitted into said openings, caps closing the outer ends of said cylinders, pistons operating in said cylinders, a common driving means for said pistons located within the aforesaid housing frame, and valve controlled conduit means through which fluid is forced by alternate said pistons respectively to said upper and lower reservoirs, said reservoirs forming a part of said conduit means.

3. In a pumping assembly, an upper reservoir, a lower reservoir, each of said reservoirs having extending through it an annular cross-wall, a housing frame having an upper end attached to and closed by said upper reservoir and a lower end attached to and closed by said lower reservoir thereby maintaining said annular cross walls in alinement with each other, a crank shaft having end portions journalled in said annular cross walls, pumping cylinders arranged in said housing radially with respect to said annular cross wa1ls, caps closing the outer ends of said cylinders, pistons operating in said cylinders, said pistons having rods operatively connected with said crank shaft, and a valve controlled conduit system to which said cylinders are operatively related, said reservoirs forming a part of said conduit system said conduit system connecting certain of said cylinders to said upper reservoir and the remainder of said cylinders to said lower reservoir.

4. In a pumping assembly, a closed-in horizontally positioned reservoir having a vertical dimension relatively small in relation to its horizontal dimensions, said reservoir having extending vertically through its interior an annular cross wall, the space within said cross wall being open at the lower side of the tank, a housing of which said reservoir forms a top cover member, a lower bearing within said housing in a downwardly spaced relation to said cross wall, an upper bearing within said cross wall, a pump structure within said housing comprising pistons operated by a crank shaft having end portions journaled in said bearings,l and conduits operatively related to said reservoir and pump structure.

5. In a pumping assembly, an upper reservoir, a lower reservoir, each of said reservoirs having extending through it an annular cross wall, a housing frame having an upper end attached to and closed by said lower reservoir thereby maintaining said annular cross walls in alinement with each other, a crank shaft having end portions journalled in said annular cross walls, pumping cylinders arranged in said housing radially with respect to said annular cross walls, caps closing the outer ends of said cylinders, pistons operating in said cylinders, saidpistons having rods operatively connected to said crank shaft, and a valve controlled conduit system to which said cylinders are operatively rela-ted, said reservoirs forming a part of said conduit system, said conduit system comprising two divisions, one of which is open to the atmosphere and is arranged to 'force air through one of said reservoirs, and the other of which is arranged to force water through the other of said reservoirs, alternate said cylinders being in communication with the portion of said conduit system which conducts air, and the intervening cylinders being in communication With the portion of said conduit system which conducts Water.

KNUT E. LUNDIN. 

